Graphics Reference
In-Depth Information
tensions and stresses within the figure contribute to an action or how they
counter weights or stresses applied to the figure.
If we consider the action of a figure throwing a javelin, we can see how the
action of the throw progresses through the figure and how the energy of
the throw flows through the body. If the figure is throwing the javelin from
a standing position—that is, not running—we may see how the movement
starts from the ankle. The entire body will begin by moving forward and
slightly pivoting at the ankles. The energy quickly moves on to a movement
in the legs and progresses to a twist in the hips. This creates a rotation in
the upper torso. At this point there is considerable momentum in the throw,
which is increased as the shoulders continue to rotate around. The energy of
the throw is evident through the progressive movement of the upper arm,
which moves rapidly forward, an action taken up by the forearm, then the
hand, and finally the fingers, before the javelin is released. In this model we
can see how the energy flows from the ankles right through the fingertips to
complete the throw.
Not all actions are as extreme as a javelin throw, and the flow of energy will
be different in each case, but if the animator understands this flow of energy,
it will invariably make for more fluid motion and naturalistic animation in the
animator's work.
